Remix based on the Ender 3 calibration files by TeachingTech and the Speed test by poddy71.

I have removed the writing from the file from poddy71 and added some markers every 5mm instead.

The tower has a height of 65mm. If you want a different height you can use your slicer to cut smaller pieces from the stl or use the included Fusion 360 file to make your own tower.